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Recognised as Colour

#373C80

  • #373C80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#373C80 is a blue with RGB values 55, 60, 128 and HSL 236°, 40%, 36%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#373C80#373C80
HEX#373C80
RGBrgb(55, 60, 128)
RGB (0–1)0.2157, 0.2353, 0.502
RGB percentages21.6%, 23.5%, 50.2%
HSLhsl(235.9, 39.9%, 35.9%)
HSV / HSBhsv(235.9, 57%, 50.2%)
CMYK57%, 53.1%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,619,968
CSS custom property--colour: #373C80;

Brightness & contrast

Relative luminance0.05602WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.9:1
Contrast with white9.9:1WCAG normal text: AAA
Contrast with black2.12:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#C8C37F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#184682no red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#0C407Fno green cones; the most common form, about 1% of men; ΔE 9.7 from the original
Tritanopia#124B58no blue cones; rare, and affects men and women equally; ΔE 41.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.9:1WCAG large text: AAA
Contrast with black, large text2.12:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 7.9Midnight blue · ΔE 20.5Rebecca purple · ΔE 25.4Slate blue · ΔE 30.3Royal blue · ΔE 33.2Medium purple · ΔE 33.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 7.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#807B37
Analogous#376180, #573780
Triadic#80373C, #3C8037
Split complementary#805737, #618037
Tetradic#803761, #807B37, #378057

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A9ACDA
Lighter +30%#858ACB
Lighter +20%#6268BB
Lighter +10%#464DA4
Darker −10%#282B5C
Darker −20%#181B39
Darker −30%#090A15
Darker −40%#000000
More saturated +25%#202897
Less saturated −25%#4E5069

Channel breakdown

R55
G60
B128
Red55 (21.6%)
Green60 (23.5%)
Blue128 (50.2%)
Hue235.89°
Saturation (HSL)39.89%
Lightness35.88%
Dominant channelBlue
Hex per channelR 37 · G 3C · B 80

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Every value on this page was computed from “373c80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.